Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Patent
1997-06-23
2000-06-06
Kizou, Hassan
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
708209, 708505, 708670, G06F 738, G06F 750
Patent
active
060731508
ABSTRACT:
In the present invention, a method for directing parallel processing computing device to perform the operation of setting a signed value of N bits to an absolute value comprises the steps of: performing an arithmetic shift right of N-1 bit to form a bit mask; performing an exclusive-OR logical operation with the signed value of N bits and the bit mask to form a result; and subtracting the bit mask from the result of the exclusive-OR logical operation to form the absolute value of the signed value of N bits. Further, an apparatus for parallel processing a signed value to form an absolute value comprises: means for performing an arithmetic shift right of N-1 bit to form a bit mask; means for performing an exclusive-OR logical operation with the signed value of N bits and the bit mask to form a result; and means for subtracting the bit mask from the result of the exclusive-OR logical operation to form the absolute value of the signed value of N bits.
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Sun Microsystems "The UltraSPARC Processor--Technology White Paper, The UltraSPARC Architecture" Nov. 14, 1995.
Kizou Hassan
Lee Douglas S.
Sun Microsystems Inc.
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